1) What is planets made of? a) rock and gas b) water and plants c) rock and plants 2) How big is the sun? a) 700,00 b) 696,340 c) 697,430 3) What is Saturn ring made of? a) water b) rock c) gas 4) How hot is the sun? a) 5,778 K. b) 5,666 k. c) 7.788 k. 5) How old is the solar system? a) 4.5 billion years old b) 4.5 trillion years old c) 5.4 billion years old 6) How to say sun in Chinese? a) Tàiyáng b) Tàiyángxì c) Érzi

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